package com.cheney.demo.singletion;

public class SingletionDoubleCheck {

	private SingletionDoubleCheck(){}
	
	private static SingletionDoubleCheck instance=null;
	
	public static SingletionDoubleCheck getInstance(){
		if(instance==null){
			synchronized (SingletionDoubleCheck.class) {
				if(instance==null){
					instance=new SingletionDoubleCheck();
				}
			}
		}
		return instance;
	}
	
	
}
